title: MDCT detection of airway stent complications: comparison with bronchoscopy.
abstract: OBJECTIVE
  The objective of our study was to evaluate the detection rate of central airway stent complications using MDCT as compared with bronchoscopy.
  
  
  METHODS
  A review was performed of all consecutive patients undergoing MDCT and bronchoscopy for suspected complications of airway stents during an 18-month period. MDCT images were interpreted in a blinded fashion by an experienced thoracic radiologist before bronchoscopy was performed, and the accuracy of MDCT was determined using bronchoscopy as the gold standard. MDCT images were specifically assessed for the presence of the following complications: narrowing of stent lumen due to granulation tissue or secretions (or both), stent fracture, stent invasion by adjacent neoplasm, stent migration, and perforation of adjacent airways.
  
  
  RESULTS
  The study population was composed of 21 patients, with mean age of 48 years (range, 16-79 years), who underwent tracheal (n = 3), tracheobronchial (n = 7), or bronchial (n = 11) stent placement for benign (n = 13) or malignant (n = 8) airway disorders. Eleven of 21 stents were metallic and the remaining 10 were silicone. Thirty complications were detected in 21 patients, including stent luminal narrowing due to granulation tissue or secretions (or both) (n = 13), stent migration (n = 9), stent fracture (n = 4), stent invasion by adjacent neoplasm (n = 3), and tracheal perforation (n = 1). MDCT accurately detected 29 (97%) of the 30 complications diagnosed by bronchoscopy. There was one false-negative case in which MDCT failed to detect a stent fracture. There were no false-positive diagnoses of stent complications.
  
  
  CONCLUSIONS
  MDCT is highly accurate for detecting airway stent complications.
authors.affiliation: Center for Airway Imaging, Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave., Boston, MA 02215, USA. vdialani@bidmc.harvard.edu
authors.forename: Vandana
authors.initials: V
authors.lastname: Dialani
authors.forename: Armin
authors.initials: A
authors.lastname: Ernst
authors.forename: Maryellen
authors.initials: M
authors.lastname: Sun
authors.forename: Karen S
authors.initials: KS
authors.lastname: Lee
authors.forename: David
authors.initials: D
authors.lastname: Feller-Kopman
authors.forename: Diana
authors.initials: D
authors.lastname: Litmanovich
authors.forename: Alexander
authors.initials: A
authors.lastname: Bankier
authors.forename: Phillip M
authors.initials: PM
authors.lastname: Boiselle
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001999:Bronchoscopy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012120:Respiration Disorders / Q000000981:diagnostic imaging* / Q000209:etiology*; D012680:Sensitivity and Specificity; D015607:Stents / Q000009:adverse effects*; D014057:Tomography, X-Ray Computed / Q000379:methods*